Well, she's showing off some fresh moves in the second season of her NBC show "Betty White's Off Their Rockers," which is set to air Tuesday, and she visited the show to talk about what viewers can expect. Like, say, PSY -- who joins in on a segment where he displays his "Gangnam Style."

It's possibly for the last time, since the singer has said he's retiring the hit. When told this, White remained magnanimous. "Now, what more can I serve humanity with?" she said.

But as she prepares for her "second-annual 90th birthday party," White still knows about how to keep it moving, dancing and otherwise. "Comedy is like music," she said. "It's a rhythm, and it's hard to teach it to somebody who doesn't have it."

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Betty White

From her early days in Hollywood to roles on "Mary Tyler Moore" and "The Golden Girls" to her resurgence of fame at 90, the actress is beloved by many.

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Betty, meet Betty

At 90, Betty White is more popular than ever. Here she poses with a bust of her likeness at the Academy of Television Arts & Sciences in North Hollywood, Calif. on May 10, 2012.

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Center stage

"Hot in Cleveland" castmares Wendie Malick, White and Jane Leeves present the award for outstanding comedy series to ABC's "Modern Family" at the GLAAD Media Awards in Los Angeles on April 21, 2012.

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White voices the character Grammy Norma in the 2012 animated comedy "The Lorax," based on the famed Dr. Seuss book.

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Queen of Hollywood

White is shown here before the taping of "Betty White's 90th Birthday: A Tribute To America's Golden Girl" which aired on NBC in January 2012.

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Still 'Hot'

White reacts as she and cast members Wendie Malick, Jane Leeves and Valerie Bertinelli accept the Favorite Cable TV Comedy award for their TV series, "Hot in Cleveland," at the 2012 People's Choice Awards in Los Angeles on Jan. 11, 2012.

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Friend to animals

White signs copies of her new book "Betty & Friends: My Life at the Zoo" in 2011. The lifelong animal lover wrote about the animals she visits at the Los Angeles Zoo.

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Dishing with 'SNL'

In 2010, White joined Ana Gasteyer and Molly Shannon for the "Delicious Dish" sketch on "Saturday Night Live," unafraid to joke about her "muffin."

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A smooch for Elmo

White got up close and personal with Muppet Elmo on TODAY in 2010.

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Shake your booty

Actresses Sandra Bullock and and White joke around during during the 2010 Teen Choice Awards.

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What a life

White poses with the Life Achievement Award she won at the 16th Annual Screen Actors Guild Awards in 2010.

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Charmed, I'm sure

Betty White visits "Late Night With Jimmy Fallon" at Rockefeller Center in New York on Nov. 28, 2011.

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Thank you for being a friend

In "The Golden Girls," which ran from 1985 to 1992, White starred with Rue McClanahan, Bea Arthur and Estelle Getty as four older women who share a home in Miami.

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Honoring her husband

White places her hand on the star that was presented posthumously to her husband, Allen Ludden, on the Hollywood Walk of Fame in Los Angeles in 1988. White's own star is right next to Ludden's.

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'Golden' moment

"The Golden Girls" introduced White to a new generation of fans.

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Four friends

White outlived all of her "Golden Girls" companions -- Estelle Getty died in 2008, Bea Arthur in 2009 and Rue McClanahan in 2010

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White leans against Sultan, a 300-pound Bengal tiger, in 1979. She was working to help plan that year's Morris Animal Foundation Annual Health Conference and luncheon.

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You're gonna make it after all

Before "The Golden Girls," White's biggest role was as Happy Homemaker Sue Ann Nivens on "The Mary Tyler Moore Show." The man-hungry Nivens hosted a cooking and decorating show, and included such topics as "What's all this fuss about famine?" and "A salute to fruit." She's seen here with Moore in 1975.

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Out on the town

White and husband Allen Ludden are seen at an International Broadcasting Awards dinner tribute to Mary Tyler Moore on March 19, 1974. Ludden was her third husband and they were married until his death from cancer in 1981. They had no children.

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Games people play

White and Ludden play the game show he hosted, "Password," with an unidentified guest in 1967.

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Gobble, gobble

White and Lorne Greene host the 1966 Macy's Thanksgiving Day parade.

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Where 'Angels' go

In 1957, White played newlywed Vicki Angel in "Date With the Angels." The show lasted just one season, and White later said, "I can honestly say that was the only time I have ever wanted to get out of a show."

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Do you know 'Chopsticks'?

White hits a high note with a canine pal in 1957.

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Home sweet home

White in her backyard garden in 1956.

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Fifties fashion

A stylish White dons a veiled hat in 1955.

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Hooray for Hollywood

White began her career in television shortly after graduating high school in 1939, and had her own radio show in the 1940s. In 1952, she began hosting "Hollywood on Television." As of 2012, she has won seven Emmys and been nominated 20 times.

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Clearly, White has always had "it": As Lauer noted, off-camera when he asked if she had a favorite joke, she asked him back, "Does it have to be clean?"

She also returned later in the show with a clip from "Rockers" featuring Kim Kardashian, in which White discovered that the two of them are "distant cousins" and, since "you Kardashians share everything," White hinted she's hoping for a connection with Kim's boyfriend, Kanye West. Kim, needless to say, didn't take that well.

"There is a difference between love and sex, isn't there?" Kathie Lee Gifford then wondered to White.

"There is. I can't remember what it is, but ..." White riffed back.

And as for that "second-annual" celebration, Gifford and Hoda Kotb got the party started early (White won't turn 91 until Jan. 17) with three cakes covered in what appeared to be 91 candles.